Rock-drill.



No. 871,594. PATENTED NOV. 19, 1907. E. N. JONES. ROCK DRILL.

APPLICATION FILED FEB. 2s, 1907.

2 SHEETS-SHEET 2.

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` /NVE/VTOH EdwaraZ/ ozea E )IM/V ATTORNEYS bi1 @d #li//LNESSES i EDWARD N. JONES, OF VICTOR, COLORADO.`

ROOK-DRILL.

Specification of Letters Patent.

Patented Nov. 19, 1907.

Application filed February 28. 1907 Serial No. 3591722.

ToaZZ whom 'it may concern:

Be it known that I, EDWARD N. JONES, a citizen `of the United States, and a resident of Victor, in the county of Teller and State of Colorado, 'have invented a new and Improved vRock-Drill, of which the following is a full,

' clear,and exact description.

T he object of the invention is to provide a new and improved rock drill, which is simple and durable in construction, very effective in Operation, and arranged to` automatically turn the drilling tool previous to the blow being struck by the hammer piston on the drill- Y ing tool.

The invention consists of novel features and parts and comblnat'ions of the same,

which will be more fully described herein- `after and then pointed out inthe claims.

A practical embodiment of the invention is represented in the accompanying drawing forming a part of this specification, in which similar characters of reference indicate correspending parts in all the views.

Figure 1 is a longitudinal central section of `the improvement Fig. 2 is alike view of the same and showing ,the hammer piston at the end of the striking stroke; Fig; 3 is a transverse section of the hammer for turning the drilling tool, the section being on the line 3;?) of Fig. 4; Fig. 4 isa longitudinal sectional elevation of the same; Fig. 5 is a side elevation of the improvement, part' being in section, and Fig. 6 is a transverse section of the means for turning the drilling tool, the section being -on the line 6--6 of Fig. 1.

In the cylinder A of the rock drill is mounted to reciprocate the hammer' piston B -adapted to strike blows on the inner end of the olygonal shank C of the drilling tool C, for t e latter toidrill the hole into the rock or other material. The polygonal shank C is mounted to turn with and slide in an axial direction in the polygonal bore of a chuck D mounted to turn in the forward head A of `thecylinder A. The chuck D is providedv .wheel F mounted to turn in the head A of the cylinder A. y

i The ratchet wheel F is provided with a lonygitudi-nally .extendin pin or lug. F2, projecting Ainto an elongate aperture G formed in v,an auxiliary piston G, mounted to reci rocate transversely in a cylinderA2 forme( 'on the forward face of the reduced the forward end of the cylinder A. The auxiliary piston G is moved inthe direction of the'arrow a. (see Fig. 6)I by the fluid ressure used for actuating the plston B, 'an the return movement of the piston G is accomplished b the exhaust motive agent from the cylin er A, aided by a spring H pressing one end of the auxiliary piston G. N ow the live motive agent for moving the piston G in the direction of the Aarrow a enters the cylinder A2 by way of an. admission port aconnected with the working chamber A3 of the cylinder A, and the exhaust motive agent from the exhaust chamber A4 of the cylinder A passes by Way of a port b into the other end of the auxiliary cylinder A2. The motive agent is' passed into the working chamber A'J by way of an admission portI c opening into the forward 'end of the working chamber A3, and which forward end is adapted to register with a port d formed in the reduced end B of the cylinder B and opening into the recess B2 formed in the piston B and part of its reduced portion B as plainly indicated in Figs. 1 and 2.

The admission port c leads from an annular recess A? formed in the head A at the rear end -of the cylinder A,`and the recess A5 y registerswith the port e leading to an inlet channel f connected with the supply pipe I, having a valve J. and connected with a suitable source of pressure supply. N ow when the several parts are in the position illus` trated in Fig. 1, and the valve J is o en, then the motive agent passes by Way o the pi e AI into the channel f, and from the latter gy way of the port e into the recess A5, and by wayof the admission port c into the forward end of the working chamber A3; The motive agent from the Working chamber A3 can now pass by Way of the port d and recess B2 into t e rear end of the working chamber A3, to force the piston B outwardLso that, rtion B strikes the inner end of the shan C', thus forcing the drilling tool C in en agement Vith the material in the bottom of the drill Whenthe parts are in the position shown in Fig. 1, then a portion `of the motive a ent passing into the rear end of the wor ing chamber A3 passes by way of the port. a. into one end of the auxiliary cylinder A2, to force the piston G transversely in the direction of .the arrow a, so that the piston G actin on the pin Fz turns the ratchet wheel F, w 'cli carries along the pawls E, thus turning the chuck D and consequently the drilling tool C immediately previous' to the piston B striking a blowl on the inner end of the shank C of the drilling tool C. Now `when the piston B is at the end oi' its outer stroke, the ort d is cut ofi from the inner end ofthe wor ing chamber Aa and is ow in communi'- cation with the exhaust chamber A, as plainly indicated in Fig. 2, and consequently the' motive agent exhausts from thel rear end of the working chamber A3 by way 'of the recess B2 and port d into the exhaust cham# ber A4. The. exhaust chamber -A4vby way. of e exhaustv port b into the auxiliar cylinder A, to immediately return the auxi iary piston G to its former.

' position aided by--the action of the spring H.

As all of the Aexhaust motive yagent is notj utilized or re uired to produce the return movement of t e auxiliary piston, the cham? ber A is provided withthe port a for the i Now the auxiliary pisthis return movement carries 5 the' pin F2 'a ong, thus rotating the ratchet esca e of the same. ton durin Wheel F -i'n the reverse direction, but 'the ratchetwheelin doing so does not takealong the pawls E, as the free ends thereof-now glide yover the teeth F.

It is' understood that when the piston G is A4 into the auxiliary cylinder A2, then the exhaust motive agent with-the aid of the device for turning the drilling Ier the motive spring H can readily return the piston G to its normal position, as indicated in Fig. 2..

When this takes place the piston 'G uncovers another exhaust perth, to allow the motive agent in the auxiliary cylinder A2 to pass out to the open air, or, in other Words, the

tool is utilized to form a inal escape agent from the exhaust chamber A4, and the exhaust motive agent is utilized to produce a return movement of t-he auxiliary piston G.

In order to feed the rock drill and to form a cushion for the same, use is made of the .fso that the motive agent from'the supp y A f pipe I can pass into the forward end of the cocv inder K. In the latter is mounted to reciprocatea piston L having its piston rod L" extending through -a suitablestuiling box N at the rear end of the cylinder K. The outer end of the piston rod L is provided with a spike or claw vfoot L2 adapted to engag? a wall or other- 1n jg. 5.'

motive agent passes in'to the forward 'end of the cylinder K to press'agains't the piston L therein, but as the latter isheld stationary by the foot L2 engaging a fixed support', it is evident that the cylinder A and the parts carried thereby are forced forward as the drilling progresses, that is, the rock drill is fedv 'automatically forward. and lat the same time'A is'cushioned bythe motive agent in the forward end of the cylinder K.

' It'is understood that the rearward sliding movement of the drilling tool C is' limited by a' collar C formed on the drilling tool "and adapted to abut against the forward 'end of the chuck D.

' ,From the 'foregoing it Willbe seen that immediately previous to the hammer piston-B s'ztriking a blow on the 'drilling tool C, the

support, as indicated -Lo'w when the rock drill isirunning,'the` latter is turned 'by the action of the auxiliary L motive agent from the chamber Ais utilized to return the piston G to its 'normal.position,

and the exhaust Amotive agent 'passes from the chamber A4 to the outer air by Way of, the' exhaust ports d, h and the c linder A2. It is further understood t -at the' return or rearward movement of the piston .B-l vtakes place'immediately 'after the motive agent hasv een exhausted from .the rear end of the Working chamber A3 into the exhaust chain--A ber A4, as the motive agent in'fthe forward end of the working chamber A3- 'acts'nthe forward face' of the piston, to return 'the Stime. I

.I Iaving. thus described my invention,- claimas new and desire to secureby Letters Patent 1. A rock -drill comprising a main cylinder,

a hammer iston therein, a drill chuck in which the filling tool is mounted to slide and to turn with 'the said chuck, a pawl on the said' drill chuck, 'a loosely mounted' ratchet wheel engaged by the saidpawl,v an

auxiliary cylinder connected by an';admis slon port and by an exhaust portwith the said main cylinder, an 'auxiliary pis-ton in the said auxiliary cylinder,` and means for connecting the piston withthesaid ratchet wheel to turn the' latter.

' 2. A rock drill, comprisinga main cylinder, a hammer piston therein, avdrl-ll'chuck in which the drilling tool is mounted to slide and turn with said chuck, a pawl onthe' chuck, a ratchet wheel surrounding the chuck and with vwhlch the pawl engages, an-

auxiliary cylinder arranged at` right ang'glesto the main cylinder and in communication therewith, an auxiliary piston in said auxiliary cylinder, and a loose connection between the piston and the ratchet wheel.

tool is mounted to slide and turn with the c uck, a pawl carried bythe chuck, a ratchet Wheel engaged rovided with a pin or lug,

bythe pawl and p an auxiliary cy inder arranged at right angles -to the mam cylinder an in communication therewith, and a piston in the auxil- -iary'lcylinder and provided with an opening into lwhich the pm or lug of the ratchet wheel projects.

4. A rock drill, comprising a main cylinder, a hammer piston in'the cylinder, a drill chuck in which the drilling t'ool is mounted to slide and turn therewith, an auxiliary cylinderprovided with exhaust ports and to the ends of which exhaust port-s of the main cylinder lead, a reci rocating pistonin the cylinder and control ing the exhaust ports there of and the exhaust orts ofthe main cylinder leading thereto, an means`for operatlng the chuckl from the auxiliary piston.

5. A rock drill, comprising a'main cylinder vhaving va Working chamber andan exhaust chamber, a lmotive agent supply connection 1n communication with the working chamber, a hammer piston working in the said chambers and provided with a chamber having a port at its forward end, an auxiliary cy inder communicating with the working and exhaust chambers, a piston in the auxiliary cylinder, a drill chuck, and means for rotating the chuck from the auxiliary piston.

6. A rock drill, comprising a main cylinder having a working chamber and an exhaust chamber, a motive agent supply connection 'in communication with the working chamber, a hammer piston Working in the said chambers and provided with a chamber havin a port at its forward end, an auxiliary cy der communicating with the working and exhaust chambers, a piston in theauxilia cylinder, a drill chuck in which the d ling tool is mounted to slide and to turn therewith, a pawl carriedby the chuck, a ratchet wheel with which-the pawl engages, and a pin and slot connection between the auxiliarypiston and the ratchet wheel.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

EDWARD N. JONES.

Witnesses:

FRANK E. JACKSON, WILLIAM RENSHAW. 

